Grain weighing scale



(No Model.) 2 Sheets-Sheet l.

C. A. LIEB.

- GRAIN WEIGHING SCALE. No. 368,840, Patented Aug. 23, 1887.

7 1 um w. fief-j ATTORNEYS (No Model.) 2 Sheetsfsheet 2.

C. A. LIBB.

GRAIN WEIGHING SCALE. No. 368.840. Patented Aug. 23., 1887,.

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UNITED STATES PATENT OFFICE.

CHARLES A. LIEB, OE NEW YORK, N. Y., ASSIGNOR TO ZINN St KAYSER, OF SAME PLACE.

GRAIN-WEIGHING SCALE.

SPECIFICATION forming part of Letters Patent No. 368,840, dated August 23, 1887.

Application filed November 13, 1886. Serial No. 218,788, (No model.)

To @ZZ whom z5 may concern:

Be it known that I, OHARLEs A. LIEB, a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in Veighing-Scales, of which the following is a specification.

rlhis invention relates to improvements in automatic scales; and it consists in the features set forth in the following specification and claims, and illustrated in the accompanying drawings, in which- Figure l is a side elevation, partly in section, of a scale containing my invention. Fig. 2 is a section in the plane au x, Fig. l. Fig. 3 is a section in the plane g/ y, Fig. l. Fig. 4 is a section in the plane z z, Fig. l. Fig. 5 is a detail view of parts of detent-levers Aand adjacent mechanism.

Similarlettersindicate corresponding parts.

A is the side frame of the machine, and' B is the top frame. A hopper, D, is suitably attached or iixed to the device-as, for example, by arms or braces J rising from the top frame, B. The hopper D leads the materiall to be weighed-such, for example, as grain-into an oscillating box, L. The oscillating box L is supported by pivots n on the uprights n. The uprights n depend from a frame, m, which rests on a knife-edge, Z.

The bearingsurfaces of the frame m which come into contact with the knife-edge Z are formed on lugs or pieces c. By having the pieces a removably attached to the frame mas, for example, by screws-said bearing lugs or pieces c can be removed when worn or frayed. The knife-edge Z rests upon the forked scale-beam H. The knife-edge Z is convenwiently formed by properly shaping a rod or bar of suitable material-such as steel-and resting said rod or bar upon suitable bearings on the scale-beam H.

The scale-beam H oscillates upon the knifeedge g, which knife-edge can be conveniently formed by a properly-shaped rod or bar resting on suitable bearings on the top frame, B. The bearingsurfaces of the scale-beam which come into contact with the knife-edge g are formed on lugs or pieces bf By having the lugs or pieces Z) removably attached to the ers surround the channels or openings c d, to

prevent any material passing through the hopper from striking the fulcra or knife-edges g Z. It is also to be noticed that by making the lugs or bearing-surfaces c b in the shape of suitable rods or bars, which rest along their length upon the knife-edge bars g Z, the strain or Wear produced by the oscillation of the beam H will not be allowed to bear only on a few isolated points, but said wear and friction will .be distributed along certain lines. The wear and strain at any one point are thus diminished. The bearingsurfaces may either be fixed to or removably formed along the rods, arms, or bearings 7c o of the beam H and frame m, and the lugs or projections a b, besides being mere bearing-surfaces, can be advantageously made to overlap or partly overlap the knife-edge bars g Z, so as to prevent lateral motion of the beam H and frame m on the knife-edges g Z.

rllhe weighingbox L is divided by a partition, N, into two compartments, and by the movements of the box L the said compartments are alternately brought into communication with the hopper D. The compartments are provided with movable bottoms O O', hinged or movably attached to the box, as shown. In the drawings the bottom O is shown as closed and its compartment as being in com.- munieation with the hopper.

To the arm I of the scale-beam is attached a weightNV, and when the quantity of material-n such as grain-which has been fed onto the bottom Ois sufficient to overbalance the weight YV the beam H will oscillate and the box L will descend. Tlie weight V, as seen, is preferable mounted upon an arm, K, rising from a pivot, M, which connects said arm K to the arm l. The position of the weight is such that on the downward movement ofthe box L' the Weight W is-rapidly oscillated or moved toward the vertical plane passing lengthwise through the knifeedge g. The effect of the IOO weight NY on the box L is thus rapidly diminished as soon as the downward motion of the box L has commenced.

To one of the uprightsn are pivoted detentlevers S S by suitable pivots, Y Y. The pivots Y Y are formed in a suitable bearing or bearings, r, attached to an upright a. To the box L are pivoted rollers X X by suitable pivots, p, having bearings in arms q, connected to the side of the box. In the drawings one ofthe rollers X is shown as in engagement with a detent-notch in the detent-lever S, whereby the box L is held in theposition shown in Fig. 2, with the bottom 0 closed. Vhcn the box L descends, the hanger T lifts the lever S out of engagement with the roller X, when the weight of the material at one side of the box L, and which presses upon the bottom O, causes the box to oscillate about the pivots a', so that the bottom O is carried away from the roller I, which before pressed'or held the bottom O shut. The bottom O is now allowed to open and the material discharges. By this motion of the box L the bottom O is closed, the detent lever S is caused to engage the other roller X, and the operation which has just been described in connection with the compartment having the bottom O is now re peated with the compartment having the bottom O. These oscillations of the box L may be registered on any suitable counting device or register.

The hangers T T dependfrom the top frame, B, and their set-screws V V are adapted to lil't the levers S S out of engagement with the rollers XX. The rollers P I, which close the bottoms O O', are adjustable on the upright a. This adjustability ol" the rollers l? P can be attained bythe means shown in the drawings, where said rollers l? P are mounted on arms It It, which are adjustably connected to the uprights u, or to arms s, connected to the uprights fn. By slotting the arms It and passing set-screwsj through the slots into the arms s said arms .R can be adjusted along the slots as desired.

The material discharging lrom the box L strikes a ridgeplate, E, connected to a lever, F, having a counter-balance, G. The material striking the ridge-plate E causes the lever F to oseillate so as to actuate the rod U,whieh connects by a eranlarm with the hoppervalve Q, thus closing the valve Q, duringthe shifting ofthe compartments of the box L.

The weight W' is made adjustable. A convenient means of adjustment of the weight is shown in the drawings, where the weight-arm Kis provided with an arm or arms,e e,provided with set-screws f. These setserews f strike against the arm I and hold the weight Yin a xed position relatively to the arm I. By properly operating the screws f the inclination ofthe weight-arm Ii to the beam-arm I is varied, thus varying the effect of the weight W upon the box L.

The oscillations of the beamvarm I can be .limited by aset-screw, t', in the frame A.. Vhen at rest, the beam-arm I rests on the lug or arm h of the frame A. The oscillations of the beamarm I can thus be limited so as to confine the oscillations to secure rapid operation of the device,while at the same time the oscillations ofthe beam-arm I can be allowed to have sufiicient scope to secure perfect operation ofthe device.

The device can be made of any suitable material-such, for example, as iron or steel. As considerable strain is brought upon the 'fulcra or turning-pointsl g and the contaetsurfaces a b, and the contact-surfaces of the bars or arms k o, it is well to make these parts of very hard and durable material-such as a superior kind of steel-which will resist wear, and which can also be polished, so as to diminish friction; also, the removability of these parts or bearing-surfaces a b gl and ol' the bearing-surfaces of the arms or bars 7c o allows the same to be replaced by new parts whenever requisitem'hile the rest ol' the device may be lel't intact. The pivots a should be so placed that the two compartments of the box L when the box is empty will be evenly balanced.

The device may be modified, if desired. For example, in. place of two adjusting-screws f pressing onto the arm I, one adjustingscrew may be made to answer by having said screw firmly connected to the arm I, said screw being only loft free to turn in said arm. Such turning oi' the screw will then move the weightarm K about the pivot M; or the arm K, instead of being movable on a pivot M, may be caused to move or slide along the arm I.

In the drawings is shown an automatic scale; but it is evident that a knife-edge bar such as the bar g and a bearing surface or bar eugaging the knife-edge bar along the lengths of the knife-edge bar and the bearing-bar can be applied to any scale, and such arrangement serves to diminish wear of the knife edge and bearing-surface. It is also evident that the bearingbar can be made to rest upon the knife-edge bar, or the knife-edge bar upon the bearing-bar, as desired, so that either the bearingbar bears upon the knife-edge bar or the k nite-edge bar bears upon the bearingbar.

As seen in Figs. et and 5, the detcnt-levers S S are pivoted independently of one another, so as not to rub or chafe against'one another and to prevent dust or other foreign matter from lodging between said levers, as might occur if said levers were pivoted to a common pivot instead of to the separate pivots Y Y. It is also to be noticed that said detent-levers S Sare pivoted on centers-that is, on points Y Y entering grooves or recesses Y2 in said levers. The levers are thus enabled to operate easily aud with little friction., and any dust or impurity that lodges on the points or centers Y will easily pass off said. centers, because of the inclined character of such centers and of their engaging-recesses Y2. It should be noticed that the pivots a, supporting the weighingbox L, also form points or centers,

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thus securing an easy oscillation of the box L, as said points or centers have free play in recesses in the box L, with which recesses said centers are in engagement.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination, with the pivoted Wei ghing-boX L, of the beam H, beam-arm I, the arm K, rising from the arm I and having pivotal adj ustment thereon, and the Weight W, carried by arm K, substantially as described.

2. The combination,with thepivoted weighing-box L, of the beam H, beam-arm I, the arm K, rising from and pivotally adjustable upon the arm I, the adjustingscrews ff, tapped through lugs on said arm K and bearing on the beam-arm I, and. the Weight W', substantially as described.

3. The cornbination,with the pivoted Weighing-box L, of the beam H, Weight W', and

knife-edge bars g Z, substantially as set forth.'

4. Ihe combination,\vith the pivoted Weighing-box L, of the beam H, Weight W, and removable knife-edge bars g Z, substantially as set forth.

5. The combinatiomwith the pivoted Weighingbox L, of the supportingframe m, knifeedge bar Z, beam H, knife-edge bar g, and Weight YV, substantially as set forth.

6. The weighingbox L, combined with the uprights u, movable `bottoms O O', and adjustable rollers P P', substantially as set forth.

7 The combination, with the Weighing-box L and hopper D, of the beam H, Weight WV, pivots or fulcra g Z, and chambers or recesses c d in the hopper, substantially as set forth.

8. The combination, with a scale-beam provided With a k nifeedge bar and a bearing surface or bar; said bars being in engagement with one another throughout their respective lengths, of a second knife-edge bar, l, and bearing surface or bar supported on said scalebeam, and being in engagement with one another throughout their respective lengths, said knife-edges and bearings extending from side to side of the machine, substantially as set forth.

9. rIhe combinationvith the oscillating box L, having hinged bottoms O O', of the adjustable rollers P P', substantially as described.

10. The combination, with the oscillating box L, pivoted on centers n and having the hinged bottoms O O', of the rollers P P', journaled on the slotted adjustable arms It, and set-screws j, passing through said slots, substantially as described.

In testimony whereof I havehereunto set my h'and and seal in the presence of two subscribing Witnesses.

CHARLES A. LIEB. [n s] Vitnesses:

W. HAUFF, E. F. KAsTENHUBER. 

